Haircloth-loom.



No. 628,23l. Patentea July 4; I899.

G. E. PERVEAR, W. W. HARRISON &. J. HOLT.

HAIRG'L'OTH LOOM.

(Application filed May 3, 1898.) (N0 Mo em 4 Sheets-Shaet l.

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No. 628,23I. Patented July 4, I899. c. E. PERVEAR, w. w. HARRISON & J.HOLT.

HAIRCLOTH LOOM.

. (Application filed May 3, 1898. I (No MOCIBL) 4 Sheets-Sheet 2.

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No. 628,23l. Patented-luly 4, I899; c. E. PERVEAR, w. w. HARRISON & .l.HOLT.

HAIRCLOTH LOOM.

(Application filed m a, 1898.)

4 Sheets-She's! 3.

(No Model.)

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HAIRCLOTH LOOM.

' (Application filed May 3, 1898.) (No Model-J 4 Shaets$heet 4.

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UNITED STATES PATENT OFFICE.

CHARLES E. PERYEAR, WVILLIAM W. HARRISON, AND JOHN HOLT, OF

PAWTUOKET, RHODE ISLAND.

HAlRCLOTH-LOOM.'

SPECIFICATION forming part of Letters Patent No. 628,231, dated July 4,1899.

Application filed May 3, 1898. Serial No. 679,602. (No model.)

To all whom, it may concern:

Be it known that we, CHARLES E. PERVEAR, WILLIAM W. HARRISON, and JOHNHOLT, of Pawtncket, in the county of Providence and State of RhodeIsland, have invented certain new and useful Improvements in Haircloth-Looms; and we do hereby declare that the following is a full, clear, andexact description thereof, reference being had to the accompanyingdrawings, and to the letters of reference marked thereon, which form apart of this specification.

This invention relates to stop-motions for looms, more especially to thelooms used for Weaving haircloth. It is fully explained and illustratedin this specification and the accompanying drawings.

Figure 1 represents a top view of the loom with the heddles and part ofthe web removedto show the stopping mechanism. Fig. 2 is a verticalsection of the loom, taken lengthwise on line 2 2, Fig. 1. Fig. 3 showsan end elevation of theloom. Fig. 4 is a perspective View of the partsof the stop-motion arranged together in working position. Fig. 5. showsa diagram of the driving-cams engaged with the heddle-cams in raisingand lowering the heddles.

The object of this invention is to produce a stop-motion for the loomthat shall operate instantly to stop the heddles and cloth-take-upmechanism when the nipper that draws the hairs across in theshed failsto catch the hair. As the weight of the running parts is so great thattheir momentum when running will not allow of the whole operatingmechanism being stopped instantly with safety to the parts, the stoppingis confined in this invention to the motion of the heddles, which arelight and in fact are not moving at the time and are only prevented fromstarting by the stopping mechanism, and to preventing the operation ofthe take-up roll, which is also intermittent in its motion and at thattime is not in operation, so that really nothingin motion is stopped,only these parts, the heddles and the take-u p, are prevented fromstarting, which leaves the shed unchanged and the web in the exactposition it was when the nipper failed to take the hair. This preventsall loss of time excepting that required to make the mispick,

as the rest of the loom mechanism will continue to run and make the nextpick-in the regular time. This makes it possible to run the loom at 'amuch higher speed.

The construction of the loom, so far as is necessary to a fullunderstanding of the invention, is as follows:

A A are the end frames ofv the loom, connected by beams in the usualway.

C is the lay, swingingon swords pivoted at their lower ends to the endframes.

D is the driving-shaft, having cranks to work the lay and thedriving-cams D and turns in bearings in the end frames A A. An auxiliaryshaft B, that operates the heddles J, is held at one end in a bearing onthe end frame and at the inner end in a bearing in a stand S. This shaftB has'a crank e on its outer end that operates the heddles J by theconnecting-rod a' and has a cam N, held to slide on it and turn with itby means of a spline in the shaft and a groove in the cam fitting on thespline. The cam D that drives the shaft B has two arms that engage insuccession with two of the leaves of the cam N on the shaft B, (see Fig.5,) each arm of the cam D giving the shaft B a quarter-turn, and

the two arms in succession give the shaft B a half-turn for eachrevolution of the shaft D, and cam D" in this way reverses the relativeposition of the heddles at each beat up of the lay. The shaft B also hasa gear 61 made fast on it, that engages with a gear (1, fast on a shortshaft 1;, held in bearings on the end frame. On the outer end of theshaft 1; a bevel-gear c is held, that engages with a bevel-gear 0, faston the end of a horizontal shaft R, held in hearings on the outside ofthe end frame. The other end of the shaft R has a worm 17 fast on it,that engages with a worm-gear L, fast on the shaft of the cloth-take-uproll H. The mechanism for stopping the heddles and cloth-take-up rollwhen the nipper g fails to secure a hair consists of a short lever 0,held on a pivot on a stand j, attached to the end frame A. This lever 0has thefeeler fpendent from the front end of it, which projects over thepathway of the lay C, so that the hair it in being drawn into the shedby the nipper 9 will be swung against the feeler f by the forward motionof the lay. An inverted-T-shaped lever K is pivoted at its center to theend frame in position to have its vertical arm, which is made broad atthe upper end, rest against the end of the lever 0 when that lever islevel. A vertical shaft F is held in hearings on the end frame and has adog P, having two arms 19 12, arranged to slide up and down on its upperend and to turn wit-h the shaft. An arm g is made fast on the lower partof the shaft F. The back horizontal arm of the T-lever has a rod 7 init, that projects in under the arm 19' of the dog P. A vertical lever G,held at its lower end in a step on the floor, has a fork at its upperend, that enters an annular groove in the sliding cam N and is connectedby a rod 25 to the arm 9 on the shaft F. A close spiral spring I)connects the lever G with the end frame to draw the lever and cam N backafter they have been drawn over by the cam g. A cam R is carried on thedriving-shaft D to operate the arm 19 of the dog P, and a cam E is alsosecured to that shaft to push down the rod r in lever K when it has beenraised; A close spiral spring 6 connects the front arm of the T-leverwith the floor to draw down that arm of the lever when allowed to do soby the movement of the lever 0.

Other parts of the loom not herein described, such as the heddlemechanism on the top of the arch (not shown) and the mechanism formoving the nipper-rod, (not shown,) may be constructed in any of theways usual in looms of this class.

The operation is as follows: iVhen the loom is started and the shaft Dis in motion, the cam D comes in contact with the cam N and turns theshaft 13 a half-turn, causing the crank 6, through the rod a and heddlemechanism, (not shown,) to raise one set of the heddles J and depressthe other and forms a shed of the warp Then the nipper g is carriedthrough the shed by its mechanism to receive the hair h from the bunch7c and draw it into the shed. As soon as this is done the lay C startsto beat the hair up in the web, and as the hair is carried by the layagainst the feelerfit will push thefeeler toward the front of the loomand tilt the lever 0 out of level, so as to allow the T-lever K to betipped over by the spring 2i, which caused the rod 1" to raise the dog Pand keep its arm 1) from being struck by the cam R as it passes, and allthe mechanism of the loom will continue running, and the cam E inpassing will push the rod 0' down again, bringing the vertical arm ofthe T-lever to rest against the end of the lever 0, and the dog P fallsdown again cam by the rod 0" out of range of the cam D, so that theshaft will not be turned by it and the heddles will not be changed. Theclothtake-up roll H will also be still; but as the lay swings back againthe nipper will again pass through the same shed,as before, as theheddles have not changed it, and the work of the loom will go on and noindication of the mispiek will be seen on the cloth. As before stated,this allows the speed of the loom to be greatly increased from sixty upto eighty or more picks per minute, besides improving the appearance ofthe cloth.

Having thus described our improvement, we claim as our invention'anddesire to secure by Letters Patent 1. In a loom, the combination of adrivingshaft, a cam fast thereon, an auxiliary shaft to operate thecloth-take-up roll, a sliding cam held on said auxiliary shaft andengaging when necessary with the cam on the drivingshaft, a feeler heldto vibrate across the top of the lay, a nipper, a second cam on thedriving-shaft, mechanism operated by said second cam, and governed bythe feeler device to move said sliding cam, mechanism connecting saidauxiliary shaft with the clothtake-up roll, and the cloth-take-up roll,substantially as described.

2. In a loom, the combination of a drivingshaft, a cam fast on saidshaft, an auxiliary shaft, a cam sliding on said auxiliary shaft toengage with said cam on the driving-shaft when required, a gear on theauxiliary shaft, a short shaft held in a bearing on the end frame, agear on said short shaft engaging with the gear on said auxiliary shaft,a bevelgear on the outer end of the short shaft, a horizontal shaft heldin bearings across the end frame, a bevel-gear on one end of saidhorizontal shaft engaging with the bevel-gear on said short shaft, aworm on the front end of said horizontalshaft, engaging with awormgearon the cloth-take-up roll, a cloth-take-up roll, a feeler, a second camon the drivingshaft, mechanism operated by said second cam to move saidsliding cam on the auxiliary shaft, substantially as described.

3. In a stop-motion for a loom the combination of a driving-shaft, a camfast thereon, an auxiliary shaft, a cam sliding thereon to be engagedwith said cam on the drivingshaft to operate the heddles when necessary,a nipper, a feeler held to vibrate across the top of the lay, mechanismcontrolled by the feeler and arranged to move the cam on the auxiliaryshaft out of engagement with the cam on the driving-shaft, and preventthe changing of the heddles when the nipper fails to take a hair,substantially as described.

4. In a loom the combination of a lay, a driving-shaft, a cam fastthereon, a nipper to draw a hair into the shed, a short horizontal leverheld on a stand attached to theloomframe, a feeler pendent from one endof said short lever, an inverted-T lever pivoted to the loom-frame andarranged to have its upa rod connecting said arm on the vertical shaft,to a lever operating the sliding cam, said lever, and sliding earn anauxiliary shaft, a second cam fast on the driving-shaft to operate saiddog, and a third cam fast on the driving-shaft to operate the inverted-Tlever, substantially as described.

In testimony whereof We have hereunto set 15 our hands this 30th day ofApril, A. D. 1898.

. CHARLES E. PERVEAR.

WILLIAM W. HARRISON.

, JOHN HOLT. I In presence of- BENJ. ARNOLD, HOWARD E. BARLOW.

